Add to BibSonomy
Abstract
We propose and experimentally demonstrate 1.7 µm gain-switched and mode-locked hybrid laser signal generation using a modulated pump and the nonlinear polarization rotation (NPR) effect. In the laser scheme, a 1.55 µm amplified modulated optical signal was used as a homemade pump. A bidirectional pumping configuration was adopted by splitting the homemade pump. A 1 m long thulium–holmium (Tm–Ho) codoped fiber was used as the gain medium. A fiber Bragg grating was employed as a spectral filter. The mode-locked laser pulse was obtained with a central wavelength of 1724 nm. The repetition rate was 11.81 MHz and the pulse width was 65.27 ps. Additionally, the gain-switched pulse sequences with a repetition rate from 50 kHz to 200 kHz were obtained by the modulated pump. Moreover, the mode-locked pulse train was filtered and modulated by the shape of the gain-switched pulse, and the hybrid pulse train was then obtained. Furthermore, the hybrid laser signals were analyzed and optimized by applying different waveforms of the modulated pump. The experimental results showed that the generated laser pulse driven by the sinusoidal signal has a better SNR (49.39 dB).
© 2022 Optica Publishing Group
Full Article | PDF ArticleMore Like This
Xinlu Zhang, Yong Luo, Tianhan Wang, Junfeng Dai, Jianxin Zhang, Jiang Li, Jinhui Cui, and Jinjer Huang
Appl. Opt. 56(11) 2973-2977 (2017)
Hongyu Luo, Fei Liu, Jianfeng Li, and Yong Liu
Opt. Express 26(20) 26485-26494 (2018)
Imtiaz Alamgir and Martin Rochette
Opt. Express 30(9) 14300-14310 (2022)